Detachable gear for transfer-presses.



Patented Dec. 23, I902.

F. L. EBERHARDT. DETACHABLE GEAR FOR TRANSFER PRESSES.

{Application filed Jan. 29. 1902.1

3 Sheets-Sheet I.

(No Medal.)

J40 z/au 07: 55% Wfi m: uonms reruns cu, mommno, wAsnngnmN. n. c

No. 716,525. Patented Dec. 23, I902.

F. L. EBERHARDT.

DETACHABLE GEAR FOR TRANSFER PRESSES.

(Apglication filed Jan. 29, 1902.)

3 Sheets-Sheet 2.

(No Model.)

I'Illllllillvl 0/, v n 2501, d 256% Patented Dec. 23, I902.

v F. L. EBEBHARDT. DETAGHABLE GEAR FOR TRANSFER PRESSES.

(Application filed Jan. 29, 1902.)

3 Sheets-Sheet 3.

(No Model.)

S'rns nrnr OFFICE.

FRED L. EBERHARDT, OF NEWARK, NEW JERSEY, ASSIGNOR TO GOULD do EBERHARDT, OF NEl/VARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

DETACHABLE GEAR FOR TRANSFER-PRESSES.

SPECIFICATION forming part of Letters Patent No. 716,525, dated December 2 902.

Application filed January 29 1902. Serial No. 91,688- (No model.)

To all whom it may concern:

Be it known that I, FRED L. EBERHARDT, a citizen of the United States, residing at 17 Hillside avenue, Newark, county of Essex, State of New Jersey, have invented certain new and useful Improvements in Detachable Gear for Transfer-Presses, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The object of the present invention is to furnish a transfer-press of the usual construction with a means of detaching the driving-pinion from the rack upon the carriage, so that the upon its upper surface with a rack, and a' transverse shaft is provided with a pinion geared into such rack and with a large handwheel for turning the shaft and pinion at pleasure to reciprocate the carriage. For reciprocating the carriage and for adjusting the roll upon the plate a hand-lever is provided at the side of the machine opposite to the handwheel and is connected directly to the carriage by a link, and the parts are so proportioned that the carriage can be moved much more rapidly and sensitively by the hand-lever than by the hand-wheel. The efiect of the engraved roll upon the plate can be felt much more perceptibly when the operator grasps the handlever than when he turns the hand-wheel, and the hand-lever is first used in adjusting the engraved roll and starting the impression; but in the presses heretofore used no means has been provided in the original construction for disengaging or separating the teeth of the pinion from the teeth of the rack, and the operator when manipulating the hand-lever is thus resisted by the inertia of the hand-wheel and his sensations are confused by the chattering of the gear-teeth as they come in contact with one another.

The present invention furnishes a means of rendering the operation of the hand-lever and the carriage more delicate and the perceptions of the operator much more sensitive to the actual work of the engraved roll. Thisis effected by providing means in the original construction for detaching the pinion from the rack or from the shaft of the hand-wheel, its detachment from the rack completely avoiding the chattering of the gear-teeth, while the.

detachment of the shaft avoids the rotation of the hand-wheel simultaneously with the hand-lever. The detachment of the handwheel from the carriage may be eifected in a variety of ways, of which several are shown in the annexed drawings.

Figure l is a side elevation of the transferpress upon a small scale; and. Fig. 2 is a side elevation, partly in section where hatched, of the carriage and the parts connected directly with its movements, the transverse shaft being provided with eccentric bearings turned to engage the pinion with the rack. Fig. 3 is an elevation of the link and its connections to the hand-lever. Fig. 4 is an elevation, partly in section where hatched, of the parts shown in Fig. 2, with the eccentric bearings turned to detach the pinion from the rack. Fig. 5 shows one edge of the carriage with the adjustable connection or clamp for the link of the hand-lever. Fig. 6 is a cross-section of the carriage with elevation of the tranverse shaft having the pinion movable endwise to detach it from the rack, and Fig. 7 is a similar view with the pinion fitted loosely to the transfer-shaft and a clutch applied to the shaft to engage it therewith when required. Fig. 8 shows a shaft with oscillating boxes to detach the pinion from the rack; Fig. 9, a longitudinal section of the table with the rack and means for detaching the same from the pinion, and Fig. 10 a plan of the means for shifting the rack.

a designates the bed of the machine; I), the carriage, carried by antifriction-rolls b.

c is the rack upon the top of the carriage, and qthe table which supports the plate to be engraved.

r is the pivoted beam actuated by the treadle s to press the engraved roll toward the plate upon the table. The pedestal, which carries the beam 1, is provided at one side with bearings, which support the transverse shaft d a little above the carriage, and a rockshaft j, which is arranged, as usual, above the transverse shaft to carry a hand-lever for moving the carriage more directly than is effected by the shaft (1. The transverse shaft d is provided with pinion e, which meshes into the rack c, and with hand-wheel h, by which the pinion may be turned to reciprocate the carriage.

The hand-lever i is pivoted upon the rockshaft j and connected by an arm is with a link and rod Z0 which form an adjustable connection to the bed by the extension of the rod through a clamp Z upon the carriage. The clamp cannot only be adjustedupon different portions of the rod, but can be Wholly released to permit the movement of the carriage by the hand-wheel independently of the hand-lever. A weight n balances the handlever, so that the operator may, if the pinion be detached from the rack, move the table through the agency of the hand-lever without any other resistance than that caused by the carriage and the engraved roll. The preferred means of detaching the pinion from the rack is shown in Figs. 2 and 4. In these figures the transverse shaft 01 is shown with eccentric bearings f, connected by a handle g to oscillate them simultaneously.

Vhen the handle is turned down, as shown in Fig. 2, the pinion meshes with the rack, and the rotation of the hand-wheel moves the table; but when the handle g is turned upward, as shown in Fig. 4, the'teeth of the pinion are detached from the rack, and the table may be actuated independently by the hand-lever.

Fig. 6 shows a construction for sliding the pinion sidewise from the rack, the pinion being fitted to a feather e to turn with the shaft d, but movable longitudinally to detach it from the rack. A hand-slide u, is provided with a yoke 11 to shift the pinion and with a set-screw w to secure the slide when adjusted. A set-screw w is also fitted to the hub of the pinion to fix it rigidly upon the shaft 01 when adjusted to prevent lost motion in operating the carriage thereby.

Fig. 7 shows a means of detaching the pinion from the transverse shaft while meshed with the rack, a clutch-hub n being attached to the shaft by the side of the pinion and bolts 0 extended through such hub, with their heads fitted to an annular slot 19 in the pinion. The tightening of the bolts secures the pinion rigidly to the shaft, while the loosening of the bolts permits the table to be reciprocated by the hand-lever without turning the hand-wheel h.

Fig. 8 shows the shaft (1 provided with a pivoted bearing f and a sliding bearing f the lifting of the latter operating, as shown in the figure, to detach the pinion from the rack, as desired. When the sliding bearing is lowered and secured in place by clampscrew g, the pinion is held in engagement with the rack. The rack is shown in Figs. 9 and 10 movable vertically and supported upon wedges 0 attached to a sliding bar 0 which is fitted beneath the rack and actuated by a hand-leverb' and link b A clamp-screw a is shown applied to the hand-lever, which secures it when the rack is elevated to hold it firmly in an operative position. The shifting of the wedges operates to lower the rack, and thus separate thepinion and rack when required. 7

All of the several devices applied to the pinion serve to disconnect the hand-wheel from the carriage, so that the carriage may be operated in a more sensitive manner by the hand-lever. It will be understood that the connection of both hand lever and handwheel to the carriage is common in such trans fer-presses and that the present invention operates upon the pinion to disconnect the hand-wheel from the carriage, so that the hand-lever may operate the carriage in a sensitive manner by freeing the carriage from the inertia and frictional resistance of the hand-wheel.

In the form shown in Figs. 2, 6, 8, and 9 the invention serves not only to disconnect the hand-wheel from the carriage, but operates also to wholly disconnect the pinion from the rack, so that the carriage may be operated by the hand-lever without the resistance of the pinion and the chattering movement of its teeth on the rack.

From the above description it will be seen that the invention does not consist merely in disengaging the pinion from the rack, but in the relation of such disengaging appliances to the two separate agencies-namely, the hand-wheel h and the hand-lever i so that each may operate the carriage independently of the other.

Having thus set forth the nature of the invention, what is claimed herein is- 1. In atransfer-press, the combination,with the bed at having a fulcrum for a hand-lever supported thereon, of the movable carriage Z), the hand-lever '5 supported upon said fulcrum and having link 70 connected detachably to the carriage, a hand-wheel having a detachable connection to the carriage adapted to move the carriage with greater power and less speed than the hand-lever i, the means for disconnecting the hand-wheel from the carriage, permitting the hand-lever to operate the carriage with less resistance, substantially as herein set forth.

2. In a transfer-press,the combination,with the bed a, movable carriage I), having the feedrack c, and means for pressing an engraved roll toward the carriage, of the gear-shaft d transverse to the carriage and provided with pinion e fitted to the said rack, the handwheel it upon the transverse shaft for moving the carriage through the pinion, the shaft j mounted upon the bed, the hand-lever 't pivoted upon said shaft, with link In connected detachably to the carriage, and means for disconnecting the hand-wheel from the carriage, whereby the carriage may be operated without rotating the hand-wheel.

3. Inatransfer-press,thecombination,with the bed a, movable carriage?) having the feed rack c, and means for pressing an engraved r011 toward the carriage, of the gear-shaft d transverse to the carriage and provided with pinion e fitted to the said rack, the handwheel h upon the transverse shaft for moving the carriage through the pinion, the shaft j my hand in the presence of two subscribing 25 witnesses.

FRED L. EBERHARDT. Witnesses:

CHARLES L. CAMERON, THOMAS S. CRANE. 

